Skip to main content
Kent Academic Repository

Control of electronic properties by lanthanide size and manganese oxidation state in the MnIII/MnIV Ruddlesden–Popper phases Ln2?xSr1+xMn2O7

Battle, Peter D., Green, M.A., Laskey, N. Scott, Kasmir, Nicholas, Millburn, Julie E., Spring, Lauren E., Sullivan, Stuart P., Rosseinsky, Matthew J., Vente, Jaap F. (1997) Control of electronic properties by lanthanide size and manganese oxidation state in the MnIII/MnIV Ruddlesden–Popper phases Ln2?xSr1+xMn2O7. Journal of Materials Chemistry, 7 (6). pp. 977-988. ISSN 0959-9428. (doi:10.1039/A608501F) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:51086)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL:
http://www.dx.doi.org/10.1039/A608501F

Abstract

The magnetic behaviour of then=2 Ruddlesden–Popper phases Sr2 LnMn2 O7 is very sensitive to the Ln3+ lanthanide cation. In samples with larger, more basic lanthanide cations (Ln=Nd, Pr) antiferromagnetic phases with ordering temperatures in the region of 130 K co-exist with phases showing a magnetic response suggestive of superparamagnetism or the development of small ferromagnetic clusters at high temperature. The magnetic transition temperature drops to 20 K in samples containing smaller, acidic cations (Ln=Gd–Er, Y). In the latter group of compounds, the transition is from a Curie–Weiss paramagnet to a spin-glass; there is no evidence for long-range magnetic order. This change in behaviour can be explained by considering the variation in the relative strength of superexchange and double exchange interactions as a function of the lanthanide cation. The influence of manganese oxidation state on magnetic response is investigated in the Sr2-x Ln1+x Mn2 O7 composition range (0.0?x?0.7) for Ln=Nd, Tb.

Item Type: Article
DOI/Identification number: 10.1039/A608501F
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Mark Green
Date Deposited: 19 Oct 2015 14:40 UTC
Last Modified: 16 Nov 2021 10:21 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/51086 (The current URI for this page, for reference purposes)

University of Kent Author Information

  • Depositors only (login required):

Total unique views for this document in KAR since July 2020. For more details click on the image.